Breakdown of the Cross-Kerr Scheme for Photon Counting
Artikel i vetenskaplig tidskrift, 2013

We show, in the context of single-photon detection, that an atomic three-level model for a transmon in a transmission line does not support the predictions of the nonlinear polarizability model known as the cross-Kerr effect. We show that the induced displacement of a probe in the presence or absence of a single photon in the signal field, cannot be resolved above the quantum noise in the probe. This strongly suggests that cross-Kerr media are not suitable for photon counting or related single-photon applications. Our results are presented in the context of a transmon in a one-dimensional microwave waveguide, but the conclusions also apply to optical systems.

circuit

computation

fluorescence

state

atom

quantum fluctuations

optical bistability

Författare

B. X. Fan

Anton Frisk Kockum

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

J. Combes

Göran Johansson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Io Chun Hoi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Christopher Wilson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Per Delsing

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

G. J. Milburn

T. M. Stace

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 110 5

Quantum Propagating Microwaves in Strongly Coupled Environments (PROMISCE)

Europeiska kommissionen (FP7), 2012-04-01 -- 2015-03-31.

Solid State Systems for Quantum Information Processing

Europeiska kommissionen (FP7), 2010-02-01 -- 2013-09-30.

Ämneskategorier

Fysik

DOI

10.1103/PhysRevLett.110.053601